DE102005007578B4 - Drill system with drill and compressor - Google Patents

Abstract

Drill system (1) with:
- a drill (2) with:
an outer frame (3) defining a fluid chamber portion (19) and having a compressed fluid inlet portion in communication with said fluid chamber portion (19),
a rotating shaft (15) rotatably supported on the outer frame (3) and formed with a fluid passage (16) in communication with the fluid chamber portion (19), the rotating shaft (15) having a leading end, on which a drilling tool (22) is releasably attachable, and wherein the fluid channel (16) is open at the front end and the rotating shaft (15) has an axis, and
a drill motor (4) provided in the outer frame (3) and drivingly connected to the rotating shaft (15) for rotating the rotating shaft (15) about the axis, the drilling tool (22) being mounted on a shaft front end is provided with a cutting edge and with a pressure fluid channel ...

Description

BACKGROUND THE INVENTION

The The present invention relates to a drill system with a drill and a compressor that can be connected to the drill. The present invention also relates to a compressor suitable for a power tool such as this drill is usable.

It is a drill for drilling holes in a structure like For example, a concrete wall or the like known as in Japanese Utility Model Application Laid-Open No. S62-201642 is disclosed. The drilling machine disclosed in this Japanese publication includes a main body and one from this main body from extending drill bit insert, also referred to as "Bohrerbit". This drill bit has an outlet opening and one with this outlet opening connected air duct. In the main body is also an air duct formed, which is connected to the air passage of Bohrerbits. The outlet is near a cutting edge is formed to compressed air near the cutting edge eject. The air duct in the main body the drill is connected to an air outlet opening of a compressor, so that the compressed air is discharged into and out of the main body the outlet opening of the drill bit is ejected. As a result, the drill bit and the workpiece to be drilled are cooled and cut out Concrete dust can be removed from a drilled hole.

at the conventional one Drill system are the rotation of a motor for turning the drill bit and the supply of the compressed air from the compressor not with each other connected. Therefore, an operator of the machine needs an air valve, that on the main body or on the compressor, adjust to the compressed air supply. This results in a complicated operation. In addition, can Compressed air is discharged from the outlet even under the condition be that the drill has not been started yet. So will Compressed air wasted uselessly. This requires a large capacity compressor the greater amount can generate compressed air, so this excessive consumption of compressed air possible is.

On a construction site or the like, where the drill is often used becomes, is also a temporary Power source set up to operate electrical tools. Because of this temporary Source of energy supplied electrical energy is less than that of a permanent energy source derived energy, may be a frequent use of power tools and the like, which consume much electric power, cause an overcurrent protection is activated and the temporary Energy source except Operation sets.

In The drill system has both the drill and the compressor a drive unit that requires a lot of electrical energy. The simultaneous use of the drill and the compressor can therefore to an activation of the overcurrent protection to lead, so the power supply during the drilling is interrupted. If two drive units operate at the same time, the operating noise is also right loud.

In in the case where the drill system is used, openings for anchorages for facade cladding Drilling will also be openings or holes stung sequentially while the operator moves along the wall surface of a building. In such a case, the drill system must also be moved. A large Compressor leads to additional Work when the compressor needs to be moved, so that manageability diminishes.

If the drill system and the compressor each with the temporary power source via respective ones Power cables are connected, also reduces an editable area on the length the shorter one Power cable. Similarly, the operator can only edit the area of the area the shorter one Power line depends. Around the editable area to enlarge, one must Position of the temporary Power source often changed become. If longer Power cables can be one centered at the one power source editable surface area be enlarged. The However, handling the cable becomes difficult, so the workability again reduced.

DE-OS 29 12 396 describes an arrangement for rock drilling with a rock drill. Air is blown into the wellbore via an air line communicating with the air duct having a drill stem. As a result, the drill dust is blown out of the borehole into a cavity formed between a coupling part of the air line and a protective sleeve attached to this coupling part, and collected there.

Out DE-OS 29 33 084 a compressor is known which draws in air via a suction line, pressurizes it and delivers it to a pressure line.

SUMMARY THE INVENTION

It It is therefore an object of the present invention to provide a compact drill system to be able to work more efficiently.

This and further objects of the present invention are achieved with An improved drill system according to claim 1.

in the Claim 11 is a compressor of such a drill system described.

advantageous optional features emerge from the subclaims.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings is

1 a perspective view showing an arrangement of a drill system according to a first embodiment of the present invention;

2 a cross-sectional view showing a drill of a drill system according to the embodiment;

3 a block diagram showing a control system of the drill system according to the embodiment;

4 FIG. 10 is a flowchart showing a work routine in the drill system according to the embodiment; FIG. and

5 a flow chart showing another working routine in a drill system according to a second embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A drill system 1 According to a first embodiment of the present invention will be described with reference to the 1 to 4 described. An in 1 illustrated drill system 1 mainly includes a drill 2 and a compressor 30 , The drill system 1 is used for drilling shallow openings in a concrete body or the like, to which screws and the like are secured. Throughout this description, a drilling direction will now be referred to as a forward direction.

In the 2 illustrated drilling machine 2 has a housing serving as an outer frame 3 , A drill bit 22 extends from a front end of the housing 3 out. An engine 4 acting as a machine for the drill 2 is located in the housing 3 , An output shaft 5 extends in the forward direction of the engine 4 out. A fan 6 for cooling the engine 4 is on the output shaft 5 attached. A handle 7 extends integrally from a lower portion of a rear end of the housing 3 out. The handle 7 is with a trigger 8th provided, and a circuit 9 that with the trigger 8th is located inside the handle 7 for controlling the rotation of the motor 4 in response to the trigger being pressed 8th , A power cable 10 that with the circuit 9 is connected, extends at a lower end of the handle 7 out.

A first wall 11 is in front of the engine 4 and inside the case 3 positioned to the output shaft 5 rotatably store. A second wall 12 is located in front of the first wall 11 and inside the case 3 , A rotating shaft 15 extends through the second wall 12 through and is rotatable by means of the second wall 12 stored over a warehouse. The second wall 12 and the bearing hold an airtight assembly between the front and the back of the second wall 12 upright.

A first gear 13A , an intermediate gear 13B and a second gear 14 are between the first 11 and the second wall 12 , More precisely, it is an intermediate wave 25 rotatably on the first 11 and the second wall 12 stored, and the first gear 13A and the intermediate gear 13B are concentric with the intermediate shaft 25 stored. The first gear 13A meshes with the output shaft 5 , The second gear 14 is concentric with the rear end portion of the rotating shaft 15 attached and meshes with the intermediate gear 13B ,

A third wall 18 is at the front end of the case 3 provided, and a front end portion of the rotating shaft 15 extends through the third wall 18 through to the front. The rotating shaft 15 is rotatable by a bearing on the third wall 18 stored. An airtight condition will be between the front and the back of the third wall 18 and the stock maintained.

An air chamber 19 is through the housing 3 , the second wall 12 , the third wall 18 and the rotating shaft 15 Are defined. An air duct 16 Coaxially extends through a front end portion of the rotating shaft 15 and is open in a front end surface of the rotating shaft 15 , An external thread is an outer peripheral surface of the front end portion of the rotating shaft 15 educated. An air opening 17 extends radially through the rotating shaft 15 through for a connection between an air chamber 19 and the air duct 16 ,

That's the air chamber 19 only over the air opening 17 and the air duct 16 in contact with the atmosphere.

A compressed air suction plug 20 is with the case 3 at a point between the second wall 12 and the third wall 18 connected to the air chamber 19 to communicate. An air hose 21 is on the compressed air intake plug 20 attached for supplying compressed air. So that occurs over the air hose 21 supplied compressed air through the compressed air suction plug 20 through and gets into the air chamber 19 initiated. Then the compressed air flows through the air opening 17 and the air duct 16 and finally into the atmosphere. The air hose 21 is shorter than the power cable 10 ,

The drill bit 22 is provided at its front end with a diamond cutting edge and at its rear end portion with an internal thread, which is connected to the external thread of the rotating shaft 15 can be screwed. An air duct 24 extends concentrically along the entire length of the drill bit 22 , The front end of the air duct 24 serves as an outlet opening 23 , and the rear end of the air duct 24 communicates with that in the rotating shaft 15 trained air duct 16 , That's how it gets out of the air duct 16 outgoing compressed air from the outlet opening 23 pushed out.

The compressor 30 mainly contains a main body 31 and an air tank 32 , In the main body 31 there is a control circuit 33 with a microcomputer, shown in 3 , In the air tank 32 is compressed air. The compressor 30 can easily be carried by hand from one place to another in terms of its size and weight. The main body 31 includes a drill connection box 37 with which the power cable 10 connectable is a power switch 44 for the drill 2 and a compressor power cable 43 , An air outlet 40 is at the main body 31 educated. The air hose 21 must with the air outlet 40 be coupled. An electromagnetic valve 38 ( 3 ) is in the main body 31 provided as a valve for the air outlet 40 to serve. There is also an air compression engine 39 ( 3 ) in the main body 31 for generating a pressurized air in the air tank 32 should be saved.

As in 3 shown is the air tank 32 with a pressure sensor 41 provided for detecting a pneumatic pressure within the tank. The drill junction box 37 is with a current sensor 42 provided that detects a current. The results of the acquisition described above are sent to the control circuit 33 forwarded.

The main body 31 also has a drill relay 34 , a valve relay 35 and an air compression relay 36 that with the control circuit 33 are connected. These relays 33 . 34 . 35 are therefore using the control circuit 33 controlled. The drill relay 34 can supply power to the drill motor 4 over the drill junction box 37 to switch on and off. The valve relay 35 can be the power supply to the electromagnetic valve 38 to switch on and off. The air compression relay 36 can supply power to the air compression engine 39 to switch on and off.

During operation, the drilling process starts with the in 1 illustrated state. That is, the power cable 10 the drill 2 comes with the drill junction box 37 of the compressor 30 connected. The air hose 21 that extends from the air outlet 40 of the compressor 30 ago, is with the Druckluftansaugstopfen 20 the drill 2 connected. The compressor power cable 43 of the compressor 30 is connected to a power source, not shown. In this state, an operator may perform the drilling operation within an imaginary circle centered on a power source, not shown, and having a radius equal to the length of the compressor power cable 43 corresponds, without the power source would have to be changed. In addition, the operator may perform the drilling operation within an imaginary circle connected to the compressor 30 is centered and has a radius equal to the length of the air hose 21 corresponds without the compressor 30 to move. As a result, that can be the compressor 30 can be easily moved, as described above, the operator perform the drilling operation within a circle which is centered on the power source, not shown, and has a radius equal to the length of the compressor power cable 43 plus the length of the air tube 21 is, without the position of the power source would have to be changed.

The power switch 44 is turned on in the state where the connections described above exist. In this condition can not be determined whether compressed air in the air tank 32 has been stored, so that also can not be determined whether the drilling process is possible, which requires this compressed air. In the initial state are the drill relay 34 , the valve relay 35 and the air compression relay 36 all in the OFF state, so all work and operations are disabled.

A pressure inside the air tank 32 is then by means of the pressure sensor 41 detected. If the detected pressure is higher than a predetermined pressure, the drill relay 34 switched on. When the trigger 8th the drill 2 pulled in this state, the drill can 2 to be activated. On the other hand, if the detected pressure is less than the predetermined pressure, the air compression relay becomes 36 switched on to the air compression engine 39 to activate. A pressure inside the air tank 32 is from the pressure sensor 41 detected at predetermined intervals even in the state where the air compression engine 39 is activated. When the detected pressure becomes higher than the predetermined pressure, the air compression relay becomes 36 turned on to the air compression engine 39 to stop. Subsequently, the drill relay 34 turned on, so the drill 2 can be activated when the trigger 8th the drill 2 is pulled.

When the trigger 8th is drawn on the condition that the air compression relay 36 is in the OFF state and the drill relay 34 in the ON state, the circuit becomes 9 turned on to allow a current in the drill motor 4 can flow in, so the drill 2 to activate. This is a current flow from that at the drill junction box 37 provided current detector 42 detected. Based on the result of this detection, the control circuit switches 33 the valve relay 35 a, allowing a current in the electromagnetic valve 38 can flow in to the air outlet 40 to open. So the compressed air is in the air tank 32 to the air hose 21 directed so that the air from the outlet opening 23 out through air ducts 16 and 24 can be directed.

One through the drill junction box 37 flowing current is from the current sensor 42 detected at predetermined intervals even in the case where the drill motor 4 is activated. When the drill 4 is stopped and the current detector 42 detects that there is no current through the drill junction box 37 flows, the control circuit switches 33 the valve relay 35 to stop the outlet of compressed air. Subsequently, a pressure inside the air tank 32 again by means of the pressure sensor 41 detected. When the detected pressure is not greater than the predetermined pressure, the air compression relay becomes 36 turned on after the drill relay 34 has been switched off, leaving compressed air in the air tank 32 by means of the air compression engine 39 is stored. When a pressure inside the air tank 32 becomes higher than the predetermined pressure, the air compression relay 36 off. The drill relay 34 is then turned on to begin the drilling process. By repeating the above-described operation, the drilling operation can be continuously performed.

The above process is based on an in 4 shown flow chart will be described. First, the power switch 44 switched on as start condition. The routine then proceeds to step S01. In step S01, an initial setting is made, that is, it is confirmed that the drill relay 34 , the valve relay 35 and the air compression relay 36 they are all in the OFF state. After this confirmation, the routine proceeds to step S02, where a pressure inside the air tank 32 is detected.

On the basis of the result of the detection S02, it is determined in S03 whether the pressure inside the air tank 32 is higher than the predetermined pressure. If it is determined that the pressure is not higher than the predetermined pressure (S03: No), the routine proceeds to step S04. In S04 the drill relay becomes 34 off. At the start time, as all relays in S01 have been turned off, the drill relay will turn off 34 held in the OFF state without change. The air compression relay 36 is then turned on in the S05 to the air compression engine 39 to activate and so compressed air in the air duct 32 save. Subsequently, the routine proceeds to step S04, where a pressure within the air tank 32 is detected again. A flow A including S02 to S05 is repeated until a pressure within the air tank 32 has become higher than a predetermined pressure.

In S03 the routine runs when the pressure inside the air tank 32 is higher than the predetermined pressure (S03: Yes), to step S06 where the air compression relay 36 is turned off to the air compression engine 39 to stop. Thereafter, the routine proceeds to step S07 where the drill relay 34 is turned on to the drill motor 4 ready to go.

If the drill motor 4 is in the ready state, the routine proceeds to step S08, where a through the drill junction box 37 flowing current is detected. On the basis of the detection result, it is determined in S09 whether or not a current is flowing, in other words, it is determined whether the operator is currently the drill 2 pressed or not. If it has been determined that the drilling is taking place (S09: Yes), the routine proceeds to step S11 where the valve relay 35 is turned on to the electromagnetic valve 38 open, allowing the compressed air from the air outlet 40 in the drill 2 is ushered in. Thereafter, the routine returns to step S08, where a through the drill connection box 37 flowing current is detected again. While the drill 2 is operated, a flow C including S08, S09 and S11 is repeated.

If it is determined in S09 that the drilling operation is not performed, that is, if no Electricity through the drill junction box 37 flows (S09: No), the routine proceeds to step S10 where the valve relay 35 is turned off. Subsequently, the routine returns to step S02. In S02, a pressure inside the air tank 32 recorded again. In S03 the routine runs when the pressure inside the air tank 32 is not greater than the predetermined pressure, to step S04 where the air compression relay 36 is turned on after the drill relay 34 has been switched off. Subsequently, the routine returns to step S02. If the drill 2 is not operated, a flow B including S02, S03 and S06 to S10 is repeated.

A drill system 1 According to a second embodiment of the present invention will now be with respect to a in 5 illustrated flowchart described. The second embodiment is similar to the first embodiment in terms of mechanical arrangement. An operation routine S1 to S11 is the same as S101 to S111 of the second embodiment. However, the second embodiment also has steps S111 to S115 for the following reasons. Because with the drill system 1 According to the above embodiment, the drilling deep holes is not accepted, the case is ignored where a pressure inside the air tank 32 drops to below a predetermined pressure during the drilling operation. As a modification of the first embodiment, the in 5 illustrated flow chart therefore the case where a pressure inside the air tank 32 falls below the predetermined pressure during the drilling operation. In the flow chart of 5 Since the routine from S101 to S111 is the same as the routine from S01 to S11 in the flowchart of FIG 4 , the description of these steps is omitted.

After the valve relay 35 has been turned on in S111, in S112 a pressure inside the air tank 32 detected. On the basis of the detection results, in S113 it is determined if the pressure inside the air tank 32 greater than a specified value for cooling the drill bit 2 is sufficient. If it has been determined that the pressure inside the air tank 32 is higher than the specified value (S113: Yes), the routine returns to step S108. When the pressure inside the air tank 32 is not larger than the specified value (S113: No), the routine proceeds to step S114 where the drill relay 34 is switched off. Subsequently, the routine proceeds to step S115 where the air compression relay 36 is switched off to stop the operation. If the drill system 1 is to be restarted, the routine of S101 is restarted.

According to the embodiments described above, compressed fluid may be automatically discharged from the compressor 30 to the drill 2 only be routed when the drill 2 is operated, and an amount of the supplied compressed fluid may be dependent on the operating state of the drill 2 be set.

As the drill motor 4 and the air compression engine 39 In addition, as the drive units that require the most electric power can not be operated simultaneously, the maximum consumption of the electric power can also be reduced, and the operating noise is reduced.

In addition, the compressed air is not wasted in the compressor 30 and a sufficient cooling effect can be expected despite the use of a compact compressor.

While the invention has been described in detail and with reference to specific embodiments, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the spirit and scope of the invention. For example, in the embodiments described above, it is determined whether the drill 2 running or not, by grasping the through the drill junction box 37 flowing electricity. Alternatively, the operation of the drill 2 but also be confirmed on the basis of a voltage change, vibration of the drill 2 , Noise or the like.

Claims (13)

Drill system ( 1 ) with: - a drill ( 2 ) with: an outer frame ( 3 ) having a fluid chamber section ( 19 ) and a compressed fluid inlet section in communication with this fluid chamber section ( 19 ), a rotating shaft ( 15 ) rotatably mounted on the outer frame ( 3 ) and with a fluid channel ( 16 ) in connection with the fluid chamber section ( 19 ), wherein the rotating shaft ( 15 ) has a front end on which a drilling tool ( 22 ) is releasably attachable, and wherein the fluid channel ( 16 ) is open at the front end and the rotating shaft ( 15 ) has an axis, and a drill motor ( 4 ) located in the outer frame ( 3 ) is provided and driving with the rotating shaft ( 15 ) for rotating the rotating shaft ( 15 ) is connected about the axis, wherein the drilling tool ( 22 ) is provided at a front end with a cutting edge and with a pressure fluid channel ( 24 ) is formed, one end of which opens towards the front end to flow as Flu idausstoßöffnung to serve, and the other end in conjunction with the fluid channel ( 16 ), when the drilling tool ( 22 ) on the rotating shaft ( 15 ) is attached; - a compressor ( 30 ) with: - a compression unit ( 31 ) which generates and stores a compressed fluid and comprises: - a fluid compression motor, - a tank ( 32 ) in which a compressed fluid generated by the fluid compression motor is stored, and a pressure detecting unit that detects a pressure of the stored compressed fluid, and a connecting portion that controls the compression unit (FIG. 31 to the fluid inlet portion for introducing the generated compressed fluid into the rotating shaft (FIG. 15 ) connects; A unit that has a drive state of the drill motor ( 4 ) detected; A control unit containing a quantity of compressed fluid coming from the compression unit ( 31 ) is to be output based on the driving state of the drill motor ( 4 ) detected by the drill motor drive detection unit, - a fluid compression motor control unit ( 36 ) that controls rotation of the fluid compression motor based on a pressure of the compressed fluid detected by the pressure detection unit, and a drill motor control unit ( 34 ), which is a rotation of the drill motor ( 4 ) on the basis of a pressure of the compressed fluid detected by the pressure detection unit. Drill system ( 1 ) according to claim 1, wherein the compressor ( 30 ) also has an electrical power supply unit which is connected to the drill motor ( 4 ) supplies electrical energy. Drill system ( 1 ) according to claim 2, wherein the drilling machine ( 2 ) also a drill cable ( 10 ) extending from the outer frame ( 3 ), and wherein the electrical power supply unit has a drill connection box ( 37 ), with which this drill cable is connectable. Drill system ( 1 ) according to claim 3, wherein the compressor ( 30 ) also a compressor power cable ( 43 ) extending from the compression unit ( 31 ) for electrical connection to an external power source. Drill system ( 1 ) according to claim 2, wherein the control unit comprises means for determining a pressure in the compressed fluid tank, means for deactivating the drilling motor, if these determining means determines that the pressure in the tank is less than a predetermined pressure, and means for activating the fluid compression motor after the deactivation means the drill motor ( 4 ) have been deactivated. Drill system ( 1 ) according to claim 5, wherein the control unit further comprises means for stopping rotation of the fluid compression motor when the determining means determines that the pressure in the compressed fluid tank exceeds the predetermined pressure, and means for moving the drill motor (10). 4 ) to its idle state after the stop means have stopped the rotation of the fluid compression motor. Drill system ( 1 ) according to claim 6, wherein the connecting portion comprises a compressed fluid outlet opening portion, and a valve mechanism for selectively closing this fluid outlet opening portion, and the control unit further comprises means for evaluating a drilling condition or non-drilling condition and means for terminating the valve mechanism when the evaluation means Determine non-drilling condition. Drill system ( 1 ) according to claim 7, wherein the control unit further comprises means for opening the valve mechanism when the evaluation means detects the drilling condition. Drill system ( 1 ) according to claim 8, wherein the control unit further comprises second means for determining a pressure in the tank for compressed fluid, second means for deactivating the drill motor ( 4 ), when said second determining means determines that the pressure is less than a second predetermined pressure, and means for deactivating the fluid compression motor after the second deactivating means drives the drill motor (10). 4 ) have been deactivated. Drill system ( 1 ) according to claim 1, wherein the unit for detecting the drill motor drive and control unit in the compressor ( 30 ) are provided. Compressor ( 30 ) of a drill system ( 1 ) according to one of claims 1 to 10, comprising - the fluid compression motor, - the tank ( 32 ) for compressed fluid, - the pressure detection unit, - the fluid compression motor control unit ( 34 ), - an outlet opening section that discharges the generated compressed fluid to the outside, and - a junction box ( 37 ), with which a power cable ( 10 ) of an external power tool ( 2 ) is electrically connectable to this power tool ( 2 ) to conduct electrical energy. Compressor ( 30 ) according to claim 11, further comprising a junction box control circuit which controls a quantity of electrical energy which the junction box ( 37 ), on the basis of the detection results of the pressure detection unit. Compressor ( 30 ) according to claim 12, in which the junction box control circuit further comprises a current sensing unit which places one in the junction box ( 37 ) is detected, and the compressor ( 30 ) further comprises a fluid amount control unit that controls an amount of compressed fluid discharged from the outlet port portion on the basis of the detection results of the current detection unit.